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| author |   Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2022-06-14 20:18:14 +0200 |
|---|---|---|
| committer |   Arnd Bergmann <arnd@arndb.de> | 2022-06-15 17:40:59 +0200 |
| commit | f2c5092190f21e02d384f750bcc473554f3aa3f8 (patch) | |
| tree | 95a6c77231708a982830842ad4b5c4c4982a5608 /include/asm-generic | |
| parent | Linux 5.19-rc2 (diff) | |
| download | linux-dev-f2c5092190f21e02d384f750bcc473554f3aa3f8.tar.xz linux-dev-f2c5092190f21e02d384f750bcc473554f3aa3f8.zip | |
arch/*: Disable softirq stacks on PREEMPT_RT.
PREEMPT_RT preempts softirqs and the current implementation avoids
do_softirq_own_stack() and only uses __do_softirq().
Disable the unused softirqs stacks on PREEMPT_RT to save some memory and
ensure that do_softirq_own_stack() is not used bwcause it is not expected.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/softirq_stack.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/softirq_stack.h b/include/asm-generic/softirq_stack.h index eceeecf6a5bd..d3e2d81656e0 100644 --- a/include/asm-generic/softirq_stack.h +++ b/include/asm-generic/softirq_stack.h @@ -2,7 +2,7 @@ #ifndef __ASM_GENERIC_SOFTIRQ_STACK_H #define __ASM_GENERIC_SOFTIRQ_STACK_H -#ifdef CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK +#if defined(CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK) && !defined(CONFIG_PREEMPT_RT) void do_softirq_own_stack(void); #else static inline void do_softirq_own_stack(void) |